Archiwum zagraniczne East News 2023-11
EN_01603227_2675
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This is a rich region in the Milky Way in northern Sagittarius. with four Messier objects: The Small Sagittarius Starcloud, aka Messier 24, is at right of centre, flanked by: the pink Messier 17, the Swan or Omega Nebula, above; and the star cluster Messier 25 at lower left. Above M25 at upper left is the star cluster NGC 6645. Below M17 is the small star cluster Messier 18. The small but rich star cluster embedded in the Starcloud is NGC 6603. The nebulosity at bottom is IC 1283, a red emission nebula; and NGC 6589/90 and NGC 6595, both blue reflection nebulas. The dark nebula on the west (right) side of M24 is Barnard 92; above it is B93. This is a stack of 12 x 4-minute exposures with the Sharpstar 61mm EDPH III apo refractor with its 0.75x Reducer for f/4.4 and 275mm focal length, and with the old unmodified Canon 6D DSLR at ISO 800. No filter was employed. All were on the ZWO AM5 mount and autoguided with the ASIAir mini-computer. Taken as part of testing the combination as an entry-level rig. Taken June 22/23, 2023, the night after summer solstice, so there was no true astronomical darkness this night from my latitude of 51° N, and what darkness there was lasted only 1 - 2 hours at best, enough to get these shots of a field well to the south where the sky was darkest. Later shots between 2 and 3 am proved too bright and twilight struck. PK Actions Nebula Filter applied as well as a Detail Extractor filter from Nik Collection Color EFX, both to enhance the nebulosity slightly.
2023-06-23
Alan Dyer / VWPics/Associated Press/East News
Associated Press
Alan Dyer / VWPics
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12,96MB
46cm x 31cm przy 300dpi
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